Hardening of resinous exudations by the use of a heterocyclic compound



Patented June 19, 1928. i v' v p v UNITED. STATES PATENT OFFICE.

ELMER ANSON DANIELS, OF BERWYN, AND HARRY STIRLING SNELL, OF CHICAGO,

ILLINOIS, ASSIGNORS TO WESTERN ELECTRIC COMPANY, INCORPORATED, OF NEWYORK, N. Y., A CORPORATION OF NEW YORK.

HABDENING OF RESINOUS EXUDATIONS BY THE USE OF A HETEROGYCLIC COMPOUND.

No Drawing. Application filed August 21, 1924. Serial No. 733,446.

This invention relates to improved comtween the two substances toproduce a conpositions of matter and methods of producden atlpn product.The temperature may 55 i g th ga be V&ll8d, but when a low temperatureis Objects of the invention are to produce an employed 1t must becontinued for a great r 5 improved composition of matter having a lengthof time than it a higher temperature resinous exudation as its base andto proused The reaction may be hastened by vide a method forproducing'the improved employing pressure with the heating, andcomposition. Where the material is to be molded the pres- According tothe main features of the ins re c n serve the double purpose of hasten-10 vent-ion a resinous exudation, preferably lng the reactlon and at thesame time formshcllac, is treated with a condensing agent mg the articleto be produced.

in such a manner as to produce a new con- This material has its greatestuse in the '05 densation product; prior to the condensing production ofmoldi g OOmPOUHdS- V iaction fillers may be incorporated with the 11sfillers sucn as lnfusorial earth, wood 15 resinous exudation andimproved molding fl r, u e t sfibre, and the like, may be incompositionsproduced thereby, corporated' Wlth the alcoholic SOllltlOIl 0f Althoughother organic compounds may shellac, the alcohol removedby evaporationbe employed, it has been discovered by us and h resl al material thenmolded by that good results are obtainable by using a s of h at andpressure into the article 20 any of the heterocyclic compounds containtleslred- A sultable mixture comprising ing a basic nitrogen group as acomponent Wood flour as a filler which when completed part of the ring.Examples of this class of can be employed as a substitute for wood OIcompounds which have been used with good er e als may have the followingproresults are the piperidine-carbon disulphide P I I IISt hellac, 50 ponds; denatured al- 25 addition products and pyridine. Although cohol, 15 gallons; piperldine-carbon disulsatisi'actory results are obtainablewith all Phlde addltlOIl pr p unds; nd of these compounds the firstmentioned W00d flour, 300 pounds. After mixing, the compound,piperidine-carbon disulphide adngr d ents are agltated untll they arethorditiou product, seems to give the greatest ughly ln ermmgled. All ofthe alcohol 1s 30 hardening effect. By piperidine-carbon dithen removedby evaporation and the resulphide addition product is meant the pia ngat rial In the form of a dry powperidine salt ofpeutamethylenedithioear- (181 can then be molded by heat and pressurebamic acid into whatever shape is desired. (1

The molding operation can be carrie on 35 (C5HNO SHC5H11N)' in a numberof ways. A specific process ,2 which gives uniformly good resultsconsists in placing the powder in a suitable mold and Various methodsmay be employed for subjecting it to a 2,000 pound pressure per treatingthe shellac with the hardening square inch for 10 or 15 minutes. during4 agent. Any chemical or mechanical method Which time a temperature from260 F to by means of which condensation or combi- 270 F. is maintained.The pressure serves nation of the two materials can be effected, thepurpose of compressing the materials and may be employed. The preferredmethod, at the same time hastening the condensing however, is todissolve the shellac in a suitaction. After the material has been sub-45 able solvent, for example, alcohol, and add jected to head andpressure for a suflicient the hardener alone or dissolved in a solventtime to complete the chemical reaction, the in greater or lesser amountsdepending upon source of heat is removed and the composithe hardnessdesired, and then removing the tion allowed to cool while still underpresalcohol by evaporation. \Vhen this form of sure.

50 treatment is employed a very intimate in- The article produced inthis manner is retermingling is vobtained. After the shellac sistant toalcohol and will soften only very and hardener have been broughttogether slightly below a temperature of 250 F. they may be heated tocause a reaction be- Although specific amounts of the ingredientsgeously as the binder for an improved cork composition, such as thatdescribed in our copending application, Serial No; 724,950,

filed July 9, 1924.

What is claimed is:

consists in adding piperidine-carbon disulphide addition productthereto, and then subjecting the resulting mixture to heat and pressure.

7. A composition of matter formed by the condensation of a resinousexudation, and a compound which is a member of the group includingpyridine, its derivative, substitution and addition. products.

8. A method of hardening a resinous exu- 1. A composition of matterformed by the dation, which consists in adding thereto a condensation ofa resinous exudation and piperidine-carbon disulphide addition product.

2. A composition of matter formed by the condensation of shellac andpiperidine-car 'bon disulphide addition product.

3. A method of hardening a resinous exudation, which consists in addingpiperidinecarbon disulphide addition product thereto, and heating.

4. A method of hardening a resinous exui dation, which consists inadding piperidinecarbon disulphide addition product thereto, and thensubjecting the resulting mixture to heat and pressure.

5. A method of hardening shellac, which compound which is a member ot'-the group includingpyridine, its derivative, substitution'and additionproducts, and heating.

9. A method of hardening a resinous exudation, which consists in addingthereto a compound which is a member of the group including pyridine,its derivative, substitution and addition'products, and then subjectingthe resulting mixture to heat and pressure.

- In Witness whereof, we hereunto subscribe our names this 16 day ofAugust, A. 1).. 1924.

ELMER ANSON DANIELS. HARRY STIRLING SNELL.

